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eligible compensation percentage Employee Stock Ownership Plan Contribution Percentage Match Of Compensation Employee Stock Ownership Plan Contribution Percentage Match Of Compensation Distribution of cash from nVent, net of cash transferred Proceeds from Sale of Interest in Corporate Unit Benefits paid Defined Benefit Plan, Benefit Obligation, Benefits Paid Property, Plant and Equipment Property, Plant and Equipment [Table Text Block] Defined Contribution Pension and Other Postretirement Plans [Axis] Defined Contribution Pension and Other Postretirement Plans [Axis] Defined Contribution Pension and Other Postretirement Plans [Axis] Remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Fair value of plan assets Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Plan Assets Finite-life intangibles, cost Finite-Lived Intangible Assets, Gross Bad debt (benefit) expense (1) Accounts Receivable, Credit Loss Expense (Reversal) Accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Contract assets Cost in excess of billings Contract with Customer, Asset, after Allowance for Credit Loss, Current Options expected to vest at end of period Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Business Combination And Disposal Groups, Including Discontinued Operations, Disclosure [Abstract] Business Combination And Disposal Groups, Including Discontinued Operations, Disclosure [Abstract] Business Combination And Disposal Groups, Including Discontinued Operations, Disclosure [Abstract] Computation Of Earnings Per Share Line Items Computation Of Earnings Per Share [Line Items] Computation Of Earnings Per Share Line Items Pension plans with a projected benefit obligation in excess of plan assets: Defined Benefit Plan, Pension Plan with Project Benefit Obligation in Excess of Plan Assets [Abstract] Future Minimum Lease Commitments Under Non-cancelable Operating Leases Lessee, Operating Lease, Liability, Maturity [Table Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Reconciliations of Gross Unrecognized Tax Benefits Reconciliation Of Unrecognized Tax Benefits Table [Table Text Block] Reconciliation Of Unrecognized Tax Benefits Table [Text Block] Basic (shares) Weighted Average Number of Shares Outstanding, Basic Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Forfeited (USD per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Carrying (Reported) Amount, Fair Value Disclosure Reported Value Measurement [Member] Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Equity method investment, ownership percentage Equity Method Investment, Ownership Percentage Other current liabilities Increase (Decrease) in Other Current Liabilities Deferred Tax Assets, Operating Loss Carryforwards, Foreign Deferred Tax Assets, Operating Loss Carryforwards, Foreign Right-of-use assets obtained in exchange for lease obligations Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Net actuarial loss (gain) Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Inventories Inventory, Policy [Policy Text Block] Provision for income taxes Total provision (benefit) for income taxes Income Tax Expense (Benefit) Cash and cash equivalents Cash and cash equivalents, beginning of year Cash and cash equivalents, end of year Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Property, Plant and Equipment, Net Property, Plant and Equipment, Policy [Policy Text Block] Pension plan assets yielded returns Historical Rate Of Return On Plan Assets Historical Rate of Return on Plan Assets Local Phone Number Local Phone Number Payments to acquire businesses Payments to Acquire Businesses, Gross Operating income (loss) Disposal Group, Including Discontinued Operation, Operating Income (Loss) Tranche 1 Share-based Payment Arrangement, Tranche One [Member] Total intrinsic value of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Derivative [Line Items] Derivative [Line Items] prepaid taxes long term Other non-current assets prepaid taxes long term prepaid taxes long term Debt, gross Total debt Long-term Debt, Gross Gross decreases for tax positions in prior periods Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Contract liabilities Contract with Customer, Liability Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Exercise of options, net of shares tendered for payment Stock Issued During Period, Value, Stock Options Exercised Credit facility maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Net periodic benefit expense assumptions Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] Award Type [Axis] Award Type [Axis] Discount rate Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate Commercial paper Commercial Paper Total fair value of shares vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Derivative Instruments and Hedging Activities Disclosure [Line Items] Derivative Instruments And Hedging Activities Disclosure [Line Items] Derivative Instruments and Hedging Activities Disclosure [Line Items] Earnings Per Share [Table] Earnings Per Share [Table] Earnings Per Share [Table] Raw materials and supplies Inventory, Raw Materials and Supplies, Gross Restricted Stock And Restricted Stock Units (RSUs) [Member] Restricted Stock And Restricted Stock Units (RSUs) [Member] Restricted Stock And Restricted Stock Units (RSUs) [Member] Retained earnings Retained Earnings [Member] Measurement Basis [Axis] Measurement Basis [Axis] Components of Net Periodic Benefit Cost Schedule of Net Benefit Costs [Table Text Block] Net cash used for investing activities Net Cash Provided by (Used in) Investing Activities Ending balance Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Share-based compensation expense Share-based Payment Arrangement, Noncash Expense [Abstract] One customer Customer One [Member] Customer One Award Type [Domain] Award Type Award Type [Domain] Senior Notes Maturing In 2021 Senior Notes Maturing In 2019 [Member] Senior Notes Maturing In 2019 [Member] Current liabilities Liability, Defined Benefit Plan, Current Cumulative Effect of New Accounting Principle in Period of Adoption Income Tax Effects Allocated Directly to Equity, Cumulative Effect of Change in Accounting Principle Restructuring Related Costs Schedule of Restructuring Reserve by Type of Cost [Table Text Block] Options exercisable at end of period (USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Pension plans Pension Plan [Member] Earnings Per Share Earnings Per Share [Text Block] Discount rate Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Variable rate debt Long-term Debt, Percentage Bearing Variable Interest, Amount Current liabilities Other current liabilities Liabilities, Current [Abstract] Federal statutory income tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Pension and other post-retirement contributions Payment for Pension and Other Postretirement Benefits Options expected to vest at end of period (USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price New accounting standards New Accounting Pronouncements, Policy [Policy Text Block] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract]